Yes, I see your point. But in this case if I wanted to change it to do it on 7, I'd have to make a change in 3 places. 1. The function definition (def multiple

Yes, I see your point. But in this case if I wanted to change it to do it on 7, I'd have to make a change in 3 places. 1. The function definition (def multiple_of_3) 2. The function contents (number % 3 == 0) 3. The function call(s). If I didn't try to use functions on this, I'd just have to change a single line (or two at the most) in my program and get on with it. Your use case is exactly what I meant when I said that breaking such a simple problem into functions actually introduces complexity.